Chaostoolkit-lib

Changed

- Controls can now update/change configuration and secrets on the fly as per
the specification [181][181]

[181]: https://github.com/chaostoolkit/chaostoolkit-lib/issues/181

Added

- Added runtime strategies for rollback as per [chaostoolkit176][].
Until now, they were never played
an activity would fail during the hypothesis or if the execution
was interrupted from a control. With the strategies, you can now decide
that they are always applied, never or only when the experiment deviated.
This is a flag passed to the settings as follows:


runtime:
rollbacks:
strategy: "always|never|default|deviated"


The `"default"` strategy remains backward compatible.

[chaostoolkit176]: https://github.com/chaostoolkit/chaostoolkit/issues/176

Added

- Added function to lookup a value in the settings from a dotted path
key [chaostoolkit65][65]

[65]: https://github.com/chaostoolkit/chaostoolkit/issues/65

Added

- Only apply rollbacks if experiment has progressed past the initial steady state hypothesis [168](168)
- Allow to not verify certificates when connecting to a HTTPS endpoint using [163](163)
self-signed certificate.

[168]: https://github.com/chaostoolkit/chaostoolkit-lib/issues/168
[163]: https://github.com/chaostoolkit/chaostoolkit-lib/issues/163

Added

- Refactored run of the experiment so that we can have multiple run strategies
such as not running the steady-state hypothesis before or after the method
but also one strategy so that the steady-state is continuously applied
during the method, with the option to bail the experiment as soon as it
deviates. [149][149]

Changed

- Potentially breaking. The following functions have moved from
`chaoslib.experiment` to `chaoslib.run`: `initialize_run_journal`,
`apply_activities`, `apply_rollbacks`.

[149]: https://github.com/chaostoolkit/chaostoolkit/issues/149

Changed

- Fix error on empty string variables call [165][165]

[165]: https://github.com/chaostoolkit/chaostoolkit-lib/issues/165

Added

- Build and test on Python 3.8

Changed

- Fix importlib_metadata call [162][162]

[162]: https://github.com/chaostoolkit/chaostoolkit-lib/issues/162

Added

- Optional default value for environment variable in configuration
- Warn the user for an action process returning a non-zero exit code
- Support for process path relative to homedir ~
- Indicate path in validation when path is not found nor executable [159][159]

Changed

- Changed the method's one-step minimum requirement.
An experiment with an empty method (without any activities) is now valid.

[159]: https://github.com/chaostoolkit/chaostoolkit-lib/issues/159